How to get JobLevel value for InternalContacts approvers on ContractsApproval BPM Worklist

Summary:

I was trying to reconfigure BPM rule for InternalContacts party under ContractsApproval worklist and need to add a Rule condition under IF section like "InternalContacts.JobLevel is 2" (i.e., add Approvers having Job level "2" only) . But this 'JobLevel' field not retuning any value (null or even >0) while using inside rule condition. No idea, if i need to JOIN the 'InternalContacts' table with any other table, since i don't have any visibility of what values are storing inside ContractsApproval Worklist fields while selecting them from 'Condition Browser'

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